Philips Linear Compact Fluorescent Lamps offer designers, specifiers and end-users new levels of efficiencies and versatility in sizes,configurations and application possibilities. With so many elegant fixtures available to complement their small size, high light output and advanced technology, Philips Energy Advantage lamps are fast becoming the preferred choice when maximum effciency and sleek design solutions are required. PL-T ALTO 42W/841/4P A 1CT 12PK. Base: GX24q-4 - Base Information: 4P - Color Code: 841 [CCT of 4100K] - Color Rendering Index: 82 Ra8 - Color Designation: Cool White - Color Temperature: 4100 K - Luminous Flux EL 25°C, Rated: 3050 Lm - Lum Efficacy Rated HF 25°C: 80 (min) Lm/W - Lamp Wattage EL 25°C, Nominal: 42 W - Lamp Voltage EL 25°C: 124 V - Lamp Current EL 25°C: 0.320 A - Dimmable: Yes